SOLUTION: System of Equations: A pet store currently has a total of 45 cats and dogs. There are 7 more cats than dogs. Find the number of cats and dogs in the store.

Question 554262: System of Equations:
A pet store currently has a total of 45 cats and dogs. There are 7 more cats than dogs. Find the number of cats and dogs in the store.
Answer by TutorDelphia(193) (Show Source): You can put this solution on YOUR website!
total of 45 cats and dogs becomes
c+d=45
There are 7 more cats than dogs becomes
d+7=c
Now since this equation is already solved for c. I know c equals d+7 so I can sub in d+7 for c into the other equation and get:
d+7+d=45
Combine like terms
2d+7=45
Subtract 7 from both sides
2d=38
Divide by 2
d=19
Plug in 19 for d
c+19=45
Subtract 19 from both sides
c=26
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